a = 'hello world'
print(a)
print(type(a))
b = "YangXu"
print(b)
print(type(b))
e = '''你
好'''
print(e)
print(type(e))
d = 'I\'m tom'
print(d)
# 输入密码
password = input("请输入你的密码：")
print(f'您输入的密码是{password}')
print(type(password))

# 下标-索引
str1 = 'abcd'
print(str1[0])